Full-sealed protective polishing wheel device for externally-supported tensioning abrasive belt

Abstract

The utility model relates to the technical field of grinding and polishing, in particular to a full-sealing protective polishing wheel device for an external supporting and tensioning abrasive belt, which comprises a first mounting seat, a main shaft, a second mounting seat, a rotary driving assembly, a mounting wheel, a movable external supporting assembly and an external supporting driving assembly, the main shaft penetrates through the second mounting base and is fixedly connected with the second mounting base, the mounting wheel is round, a first through hole is formed in the center of the mounting wheel, the mounting wheel is fixed to the mounting base, the main shaft is located in the first through hole, and a plurality of penetrating grooves distributed at intervals in a surrounding mode are formed in the peripheral wall of the mounting wheel; the number of the penetrating grooves is consistent with that of the movable outer supporting assemblies, one movable outer supporting assembly is movably installed in each penetrating groove, and the outer supporting driving assembly drives the multiple movable outer supporting assemblies to synchronously stretch out of the penetrating grooves in the direction of the outer circumferential wall of the installation wheel to tension the abrasive belt or synchronously retract inwards into the penetrating grooves to loosen the abrasive belt. The rotation driving assembly is fixed to the first installation base and connected with the main shaft to drive the main shaft to rotate.

Description

Technical Field

[0001] The present application relates to the technical field of grinding and polishing, and more specifically, to a fully sealed and protected polishing wheel device for an externally supported tensioned abrasive belt. Background Art

[0002] Grinding and polishing is a surface treatment process. In the related art, a polishing wheel device is usually used to grind and polish the workpiece. In the related art, the polishing wheel device usually includes a mounting wheel, an abrasive belt and a driving assembly. The abrasive belt is sleeved into the mounting wheel and is close to the mounting wheel. The driving assembly drives the mounting wheel to rotate and drives the abrasive belt to rotate to grind and polish the workpiece. With this solution, the abrasive belt is close to the mounting wheel, which makes it difficult to install or remove the abrasive belt, and is not conducive to the replacement of the abrasive belt. Utility Model Content

[0003] In order to solve the problem in the related art that the sanding belt needs to be close to the mounting wheel of the polishing wheel device, which makes it difficult to install or remove the sanding belt during use and is not conducive to sanding belt replacement, the present application provides a fully sealed and protected polishing wheel device for an externally supported tensioned sanding belt.

[0004] A fully sealed and protected polishing wheel device for an external support tensioning abrasive belt, comprising a first mounting seat, a main shaft, a second mounting seat, a rotation driving assembly, a mounting wheel, a movable external support assembly, and an external support driving assembly, wherein the main shaft is rotatably arranged on the first mounting seat, the main shaft passes through the second mounting seat and is fixedly connected to the second mounting seat, the mounting wheel is circular and has a first through hole at its center, the mounting wheel is fixed on the mounting seat and the main shaft is located in the first through hole, the number of the movable external support assemblies is multiple, the outer peripheral wall of the mounting wheel is provided with a plurality of through grooves arranged in an interval and surrounding manner, the number of the through grooves is consistent with the number of the movable external support assemblies and each of the through grooves has a movable external support assembly movably installed therein, the external support driving assembly is mounted on the second mounting seat, and the plurality of the movable external support assemblies are all connected to the external support driving assembly, the external support driving assembly drives the plurality of the movable external support assemblies to synchronously extend out of the through grooves toward the outer peripheral wall of the mounting wheel or synchronously retract into the through grooves, and the rotation driving assembly is fixed on the first mounting seat and connected to the main shaft to drive the main shaft to rotate.

[0005] By adopting the above technical scheme, the inner diameter of the sanding belt is set to be slightly larger than the diameter of the mounting wheel, and the sanding belt is put on the mounting wheel. The external support driving assembly drives multiple movable external support assemblies to extend through the groove toward the outer peripheral wall of the mounting wheel to press the sanding belt, so that the multiple movable external support assemblies tension the sanding belt, and the sanding belt is supported. The installation of the sanding belt is more convenient. The sanding spindle is driven to rotate by the rotating driving assembly, so that the second mounting seat rotates to drive the mounting wheel to rotate, and the rotation of the mounting wheel drives the movable external support assembly to rotate, so that the sanding belt rotates to grind the workpiece. Sanding belt grinding can cope with products with curved surface changes at different levels. The external support driving assembly drives multiple movable external support assemblies to synchronously retract inward to the groove to release the tension on the sanding belt, which is convenient for removing the sanding belt and replacing the sanding belt.

[0006] Preferably, the movable external support assembly includes a movable block and a connecting shaft, one end of the connecting shaft is connected to a side surface of the movable block, the through groove includes a first groove body matching the movable block and a second groove body matching the connecting shaft, the first groove body and the second groove body are connected and the second groove body is connected to the first through hole of the mounting wheel, a side surface of the movable block away from the connecting shaft is an arc-shaped surface matching the outer peripheral wall of the mounting wheel, the movable block is located in the first groove body, and the connecting shaft penetrates into the second groove body.

[0007] By adopting the above scheme, the movable block is located in the first groove body, the connecting shaft penetrates into the second groove body, and the connecting shaft is limited in the second groove body to obtain the support of the mounting block and the swing of the limiting connecting shaft, so that the movable block can move more stably, and the side surface of the movable block away from the connecting shaft is a curved surface that matches the outer peripheral wall of the mounting wheel so that the movable block fits the inner wall of the sand belt, so that the movable block is more stable when expanding outward to support the sand belt.

[0008] Preferably, the external support driving assembly includes a cam plate and a connecting sleeve, the center of the cam plate is provided with a second through hole, the connecting sleeve passes through the center position of the cam plate and is fixedly connected to the cam plate, the bottom end of the connecting sleeve is rotatably connected to the second mounting seat and the main shaft is located in the inner hole of the connecting sleeve, the cam plate is provided with a plurality of guide grooves spaced around its center, the plurality of guide grooves extend from the center of the cam plate to the outer side wall, the number of the guide grooves matches the number of the movable external support assemblies, the movable external support assembly also includes a follower pin, the follower pin is connected to the connecting shaft, the plurality of movable pins of the movable external support assemblies correspond one-to-one to the plurality of guide grooves and penetrate into the guide grooves and abut against the groove walls of the guide grooves, the cam plate is provided with limiting grooves connected to the guide grooves at both ends of each of the guide grooves, the guide grooves and the limiting grooves are slightly offset and the connecting part is an arc surface.

[0009] By adopting the above technical scheme, rotating the connecting sleeve drives the cam plate to rotate, so that the follower pin moves in the limit groove near the center of the cam plate to the guide groove and then to the limit groove near the outside of the cam plate, and the guide groove extends from the center of the cam plate to the outer wall, so that the side wall of the guide groove presses the follower pin outwardly, so that the follower pin moves toward the outer peripheral wall direction of the mounting wheel, driving the connecting shaft and the movable wheel to move toward the outer peripheral wall direction of the mounting wheel, so that multiple movable blocks extend the first groove body toward the outer peripheral wall direction of the mounting wheel to tension the sand belt and support the sand belt to rotate, and the connecting sleeve is rotated in the opposite direction to the moving direction of the follower pin, so that the movable block retracts to the first groove body, so that the movable block releases the tension of the sand belt, which is convenient for the installation and replacement of the sand belt; the limit groove and the guide groove are slightly offset and the connecting part is an arc surface. When the follower pin is in the two limit grooves, it has a strong contact with the arc surface of the connecting part, which plays a limiting role on the cam plate, thereby reducing the situation that the cam plate and the connecting sleeve rotate at will, causing the position of the follower pin to change, resulting in the movable block moving at will to support the sand belt Unstable situation.

[0010] Preferably, the external support drive assembly also includes a sealing flange and a torsion turntable. The sealing flange is fixedly mounted on the mounting wheel and a third through hole is provided in the center of the sealing flange, the main shaft and the connecting sleeve are located in the third through hole, the torsion turntable is connected to the end of the connecting sleeve away from the second mounting seat and is located above the sealing flange, a fourth through hole is provided in the center of the torsion turntable, the main shaft passes through the fourth through hole, at least one ball screw is provided on the bottom surface of the torsion turntable, and an arc groove matching the number of the ball screws is provided on the top surface of the sealing flange, the ball screw is inserted into the arc groove and the steel ball of the ball screw abuts against the bottom wall of the arc groove, and the sealing flange is provided with a recessed groove on the bottom wall at one end of the arc groove for clamping the steel ball of the ball screw.

[0011] By adopting the above technical solution, the twisting turntable is rotated to rotate the connecting sleeve and the cam plate, thereby driving multiple movable external support components to move toward the outer peripheral wall of the mounting wheel or retract into the through groove. The arc groove guide makes the rotation of the twisting turntable stable when the twisting turntable is rotated. The steel ball of the ball screw is clamped into the clamping groove to achieve the limit twisting turntable is not easy to rotate without external force, further reducing the situation that the cam plate and the connecting sleeve rotate at will to change the position of the follower pin, resulting in the random movement of the movable block and the unstable support of the sanding belt.

[0012] Preferably, the connecting sleeve is provided with a telescopic sealing sleeve, one end of the telescopic sealing sleeve is connected and fixed to the movable block, and the other end of the telescopic sealing sleeve is connected and fixed to the mounting wheel, a first sealing ring is arranged between the bottom surface of the sealing flange and the top surface of the mounting wheel, the first sealing ring is fixed on the sealing flange and fits with the top surface of the mounting wheel, a second sealing ring is arranged between the peripheral wall of the third through hole of the sealing flange and the connecting sleeve, the second sealing ring is fixed on the peripheral wall of the third through hole of the sealing flange and fits with the connecting sleeve, a third sealing ring is arranged between the connecting sleeve and the main shaft, and the third sealing ring is fixed to the connecting sleeve and fits with the main shaft.

[0013] The second slot body is closed by the telescopic sealing sleeve, the portion between the connecting sleeve and the mounting wheel is closed by the first sealing ring and the second sealing ring in cooperation with the sealing flange, and the portion between the main shaft and the connecting sleeve is closed by the third sealing ring, so that dust, grinding dust and added grinding fluid in the external air are not easy to fall onto the connecting position of the connecting sleeve and the first mounting seat through the first through hole of the mounting wheel, the inner hole of the connecting sleeve and the second slot body, which is beneficial to reducing the situation where the connecting sleeve is stuck due to excessive accumulation of dust and grinding fluid at the connecting position of the connecting sleeve and the first mounting seat. Dust and grinding fluid are blocked from entering the first through hole and the second slot body of the connecting sleeve machine, making maintenance and cleaning more convenient, which is beneficial to extending the service life of the equipment.

[0014] Preferably, the external support driving assembly also includes a gantry, a rotating shaft, a rotating arm, a connecting rod and a labor-saving arm. The gantry is fixed to the top surface of the mounting wheel and spans the first through hole. The rotating shaft passes through the crossbeam of the gantry and is rotatably connected to the crossbeam of the gantry and is located above the torsion turntable. One end of the labor-saving arm is fixedly connected to the top end of the rotating shaft, and the bottom end of the rotating shaft is connected to the middle part of the labor-saving arm. There are two connecting rods, which are respectively fixedly installed at both ends of the labor-saving arm and both connecting rods are fixedly connected to the torsion turntable.

[0015] By adopting the above technical solution, the effort-saving arm is rotated to drive the rotating shaft to rotate, the rotating shaft rotates to drive the rotating arm to rotate, and the rotating arm rotates to drive the twisting turntable to rotate. The effort-saving arm, the rotating shaft and the rotating arm form a effort-saving lever structure, so that rotating the twisting turntable is more labor-saving.

[0016] Preferably, it also includes a grinding disc assembly, which includes a grinding disc and a connecting piece, wherein the connecting piece is fixed to the top end of the main shaft, and the bottom surface of the grinding disc is connected to the connecting piece.

[0017] By adopting the above technical solution, the rotation of the main shaft drives the grinding disc to rotate, and the workpiece is ground and polished by placing sandpaper on the grinding disc, realizing the integration of grinding disc grinding and polishing and sanding belt grinding and polishing. The two grinding and polishing methods are suitable for grinding and polishing of various types of products, which is more convenient and practical.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. Put the sanding belt on the mounting wheel. The sanding belt is slightly wider than the mounting wheel. The outer support driving assembly drives multiple active outer support assemblies to extend through the groove toward the outer peripheral wall of the mounting wheel to press the sanding belt, so that multiple active outer support assemblies externally support and tighten the sanding belt. The sanding belt is supported. The sand spindle is driven to rotate by the rotating driving assembly, so that the second mounting seat rotates to drive the mounting wheel to rotate, and the mounting wheel rotates to drive the active outer support assembly to rotate, so that the sanding belt rotates to grind the workpiece. Sanding belt grinding can cope with products with curved surface changes on different layers. The outer support driving assembly drives multiple active outer support assemblies to retract inward synchronously to the groove to release the tension of the sanding belt. It is more convenient to remove the sanding belt and install and replace it.

[0020] 2. A grinding disc is installed on the top of the spindle. The rotation of the spindle drives the grinding disc to rotate. By placing sandpaper on the grinding disc, the workpiece can be ground and polished, realizing grinding disc grinding and polishing and sanding belt grinding and polishing in one. The two grinding and polishing methods are suitable for grinding and polishing of various types of products, which is more convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a fully sealed and protected polishing wheel device for an externally supported tensioned abrasive belt in this embodiment.

[0022] Figure 2 It is a cross-sectional view of the connection structure of the second mounting seat, main shaft, mounting wheel, movable outer support assembly, and outer support drive assembly of this embodiment.

[0023] Figure 3 It is a schematic diagram of the connection structure between the connecting sleeve and the cam plate of this embodiment.

[0024] Figure 4 It is a schematic diagram of the connection structure between the mounting wheel and the movable outer support assembly of this embodiment.

[0025] Figure 5 Schematic diagram of the structure of the sealing flange of this embodiment.

[0026] Figure 6 Schematic diagram of the structure of the twisting turntable of this embodiment.

[0027] Figure numerals: 1, first mounting seat; 2, main shaft; 3, second mounting seat; 4, rotation drive assembly; 41, motor; 42, coupling; 5, mounting wheel; 51, through slot; 511, first slot body; 512, second slot body; 52, support platform; 6, movable outer support assembly; 61, movable block; 62, connecting shaft; 621, slot; 622, threaded hole; 623, telescopic sealing sleeve; 63, follower pin; 7, outer support drive assembly; 71, cam plate; 711, guide Groove; 712, limit groove; 72, connecting sleeve; 721, third sealing ring; 73, sealing flange; 731, arc groove; 732, clamping groove; 74, twist turntable; 741, ball screw; 742, fourth sealing ring; 743, fifth sealing ring; 75, first sealing ring; 76, second sealing ring; 77, gantry; 78, rotating shaft; 79, rotating arm; 70, connecting rod; 701, effort-saving arm; 8, grinding disc assembly; 81, grinding disc; 82, connecting piece. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Reference Figure 1 and Figure 4, a fully sealed and protected external support tensioning abrasive belt polishing wheel device, comprising a first mounting seat 1, a spindle 2, a second mounting seat 3, a rotation drive assembly 4, a mounting wheel 5, a movable external support assembly 6, and an external support drive assembly 7, the spindle 2 passes through the first mounting seat 1 and is rotatably connected to the first mounting seat 1, the rotation drive assembly 4 comprises a motor 41 and a coupling 42, the motor 41 is fixed to the bottom of the first mounting seat 1 and its output shaft is connected to the spindle 2 through the coupling 42, the motor 41 drives the spindle 2 to rotate, the part of the spindle 2 away from the motor 41 passes through the second mounting seat 3 and its outer wall is fixedly connected to the second mounting seat 3, the second mounting seat 3 is arranged in a circular plate and the center of the second mounting seat 3 is on the same straight line as the axis of the spindle 2, the mounting wheel 5 is circular and has a first through hole in its center, the mounting wheel 5 is fixed on the second mounting seat 3 and the spindle 2 is located in the first through hole, the center of the mounting wheel 5 is on the same straight line as the axis of the spindle 2, the number of the movable external support assemblies 6 is four, the outer periphery of the mounting wheel 5 The wall is provided with four through grooves 51 arranged in an interval and surrounding manner, and each through groove 51 has a movable outer support component 6 movably installed therein, the outer support driving component 7 is installed on the second mounting seat 3, and the four movable outer support components 6 are all connected to the support driving component, and the outer support driving component 7 drives the four movable outer support components 6 to synchronously extend out of the through groove 51 toward the outer peripheral wall of the mounting wheel 5 or synchronously retract inward into the through groove 51, the sanding belt is set to have an inner diameter slightly larger than the diameter of the mounting wheel 5, and the sanding belt is sleeved on the mounting wheel 5, and the four movable outer support components 6 are driven by the outer support driving component 7 to extend out of the through groove 51 toward the outer peripheral wall of the mounting wheel 5 to press the sanding belt, and the movable outer support component 6 tensions and supports the sanding belt, and the motor 41 drives the main shaft 2 to rotate and drive the second mounting seat 3 and the mounting wheel 5 to rotate to realize the rotation of the sanding belt, and the workpiece is ground by the rotation of the sanding belt, and the multiple movable outer support components 6 are driven by the outer support driving component 7 to synchronously retract inward to the through groove 51 to release the tension of the sanding belt, so that the sanding belt can be removed and replaced conveniently.

[0030] Reference Figure 2 and Figure 4 The movable outer support assembly 6 includes a movable block 61 and a connecting shaft 62, one end of the connecting shaft 62 is connected to a side surface of the movable block 61, the through groove 51 includes a first groove body 511 matching the movable block 61 and a second groove body 512 matching the connecting shaft 62, the first groove body 511 passes through the upper and lower surfaces of the mounting wheel 5, and the second groove body 512 passes through the mounting wheel 5 from the side wall of the first groove body 511, so that the first through hole is connected to the second groove body 512, and the connecting shaft 62 is supported by passing through the second groove body 512, the movable block 61 is located in the first groove body 511, and the upper surface of the movable block 61 is flush with the upper surface of the mounting wheel 5, and the lower surface of the movable block 61 is flush with the lower surface of the mounting wheel 5, and the side of the movable block 61 away from the connecting shaft 62 is a curved surface matching the outer peripheral wall of the mounting wheel 5, so that the movable block 61 fits the inner wall of the sand belt, so that the movable block 61 is more stable when expanding outward to support the sand belt.

[0031] Reference Figure 2 and Figure 3 The outer support driving assembly 7 includes a cam plate 71 and a connecting sleeve 72. A second through hole is opened in the center of the cam plate 71. The connecting sleeve 72 passes through the center of the cam plate 71 and is fixedly connected to the cam plate 71. The bottom end of the connecting sleeve 72 is rotatably connected to the second mounting seat 3 and the main shaft 2 is located in the inner hole of the connecting sleeve 72. The center of the cam plate 71 and the axis of the connecting sleeve 72 and the axis of the main shaft 2 are on the same straight line. Four guide grooves 711 are arranged on the cam plate 71 around the center of the cam plate 71 at intervals. The four guide grooves 711 extend from the center of the cam plate 71 to the outer side wall.

[0032] Reference Figure 2 , Figure 3 and Figure 4, a slot 621 is provided at one end of each connecting shaft 62 away from the movable block 61, and the four connecting shafts 62 are all connected to the cam plate 71 through the slot 621, and the four connecting shafts 62 are aligned one by one with the four guide grooves 711, and each movable outer support assembly 6 also includes a follower pin 63, and a threaded hole 622 is also provided on the outer wall of the connecting shaft 62, and the threaded hole 622 passes through the connecting shaft 62 and is located at the position of the slot 621, and the follower pin 63 is a bolt, and the bolt is threadedly connected into the threaded hole 622 and passes through the slot 621 and penetrates into the guide groove 711, and the bolt The portion between the guide groove 711 is a non-threaded round rod, and this portion abuts against the groove wall of the guide groove 711. The cam plate 71 is moved by rotating the connecting sleeve 72, and the follower pin 63 is pressed by the groove wall of the guide groove 711 to move. The rotation direction of the connecting sleeve 72 is different, and the connecting shaft 62 is limited by the second groove body 512, so that the follower pin 63 moves linearly from a position close to the center of the cam plate 71 to a position close to the outside of the cam plate 71, or from a position close to the center of the cam plate 71 to a position close to the center of the cam plate 71, so as to achieve The movable block 61 is driven to extend out of the first slot body 511 to press against the sand belt or retract to the first slot body 511 to relax the tension on the sand belt, which is convenient for replacing the sand belt. Furthermore, the cam plate 71 is provided with a limiting groove 712 connected to the guide groove 711 at both ends of each guide groove 711. The guide groove 711 and the limiting groove 712 are slightly offset and the connecting part is an arc surface. When the follower pin 63 is in the limiting groove 712 near the center position of the cam plate 71, the movable block 61 is in the retracted state in the first slot body 511. When the follower pin 63 is in the limiting groove 712 near the outer position of the cam plate 71, the movable block 61 is in the retracted state in the first slot body 511. When in the groove 712, the movable block 61 is in an extended state in the first groove body 511, the limit groove 712 and the guide groove 711 are slightly offset and the connecting part is an arc surface, and the follower pin 63 has a strong contact with the arc surface at the connecting part when in the two limit grooves 712, which plays a limiting role on the cam plate 71, thereby reducing the situation in which the cam plate 71 and the connecting sleeve 72 rotate at will, causing the position of the follower pin 63 to change, resulting in the movable block 61 moving at will and causing unstable support for the sanding belt. By rotating the connecting sleeve 72 with force, the follower pin 63 can move out of the limit groove 712 and move in the guide groove 711.

[0033] Reference Figure 2 , Figure 5 and Figure 6The outer support drive assembly 7 also includes a sealing flange 73 and a twisting turntable 74. The mounting wheel 5 is provided with a support platform 52 on the inner wall of the first through hole that matches the outer contour of the sealing flange 73. The bottom surface of the sealing flange 73 fits the top surface of the support platform 52 and is fixed to the support platform 52 through bolts. The center of the sealing flange 73 is provided with a third through hole. The spindle 2 and the connecting sleeve 72 are located in the third through hole. The twisting turntable 74 is connected to the end of the connecting sleeve 72 away from the second mounting seat 3 and is located above the sealing flange 73. A fourth through hole is provided in the center of the twisting turntable 74. The spindle 2 passes through the fourth through hole. Two symmetrically arranged ball screws 741 are provided on the bottom surface of the twisting turntable 74. The top surface of the sealing flange 73 is concavely provided with an arc groove 731 that matches the ball screw 741. The number of the arc grooves 731 is two, which correspond to the two ball screws 741 respectively. The ball screw 741 penetrates the arc groove 731. When the locking cam 731 is engaged with the locking cam 732, the locking cam 732 can be locked to the locking cam 730, so that the locking cam 730 can be locked to the locking cam 730.

[0034] Reference Figure 2 , Figure 4 and Figure 5, further, the connecting shaft 62 is sleeved with a telescopic sealing sleeve 623, one end of the telescopic sealing sleeve 623 is connected and fixed to the movable block 61, and the other end of the telescopic sealing sleeve 623 is connected and fixed to the mounting wheel 5. A first sealing ring 75 is arranged between the bottom surface of the sealing flange 73 and the top surface of the mounting wheel 5, and the first sealing ring 75 is fixed on the sealing flange 73 and fits the top surface of the mounting wheel 5. A second sealing ring 76 is arranged between the peripheral wall of the third through hole of the sealing flange 73 and the connecting sleeve 72, and the second sealing ring 76 is fixed on the peripheral wall of the third through hole of the sealing flange 73 and fits the connecting sleeve 72. A third sealing ring 721 is arranged between the connecting sleeve 72 and the main shaft 2, and the third sealing ring 721 is fixed to the inner hole wall of the connecting sleeve 72 and fits the main shaft 2. The second groove body 512 is closed, and the portion between the connecting sleeve 72 and the mounting wheel 5 is closed by the first sealing ring 75 and the second sealing ring 76 in cooperation with the sealing flange 73, and the portion between the main shaft 2 and the connecting sleeve 72 is closed by the third sealing ring 721, so that dust, grinding dust and external grinding fluid in the external air are not easy to fall into the connecting position of the connecting sleeve 72 and the second mounting seat 3 through the first through hole of the mounting wheel 5, the inner hole of the connecting sleeve 72 and the second groove body 512, which is beneficial to reduce the situation where the connecting sleeve 72 is stuck due to excessive accumulation of dust and grinding fluid at the connecting position of the connecting sleeve 72 and the second mounting seat 2, and the dust and grinding fluid are blocked from entering the first through hole, the connecting sleeve 72 and the second groove body 512, which is convenient for maintenance and cleaning, and is beneficial to extending the service life of the equipment.

[0035] Reference Figure 2 and Figure 6 Furthermore, a fourth sealing ring 742 is provided between the twisting turntable 74 and the sealing flange 73, and the fourth sealing ring 742 is fixed to the outer edge of the bottom of the twisting turntable 74 and fits the top surface of the sealing flange 73. A fifth sealing ring 743 is also provided between the twisting turntable 74 and the main shaft 2, and the fifth sealing ring 743 is fixed on the inner wall of the fourth through hole and fits the main shaft 2. Through the sealing of the fourth sealing ring 742 and the fifth sealing ring 743, dust and grinding fluid are blocked from entering between the twisting turntable 74 and the sealing flange 73, reducing the accumulation of dust and grinding fluid in the arc groove 731 and the card groove 732, which causes the connecting sleeve 72 to get stuck when rotating, which is beneficial to extending the life of the equipment.

[0036] Reference Figure 1A fully sealed and protected external support tensioning abrasive belt polishing wheel device also includes a grinding disc 81 assembly 8, which includes a grinding disc 81 and a connecting piece 82. The connecting piece 82 is fixed to the top of the main shaft 2, and the bottom surface of the grinding disc 81 is connected to the connecting piece 82. The rotation of the main shaft 2 drives the grinding disc 81 to rotate. By placing sandpaper on the grinding disc 81, the workpiece is ground and polished, and the grinding disc 81 grinding and polishing and the abrasive belt grinding and polishing are integrated. The two grinding and polishing methods are suitable for grinding and polishing of various types of products, which is more convenient and practical.

[0037] Reference Figure 1 The external support driving assembly 7 also includes a gantry 77, a rotating shaft 78, a rotating arm 79, a connecting rod 70 and a labor-saving arm 701. The gantry 77 is fixed to the top surface of the mounting wheel 5 and spans the first through hole. The crossbeam of the gantry 77 is located above the grinding disc 81. The rotating shaft 78 passes through the crossbeam of the gantry 77 and is rotatably connected to the crossbeam of the gantry 77 and is located above the grinding disc 81. One end of the labor-saving arm 701 is fixedly connected to the top of the rotating shaft, and the bottom end of the rotating shaft is connected to the labor-saving arm 701. In the middle part of the force arm 701, there are two connecting rods 70 which are respectively fixedly installed at the two ends of the force-saving arm 701 and the two connecting rods 70 are fixedly connected to the twisting turntable 74. The force-saving arm 701 is turned to rotate the rotating shaft 78, the rotating shaft 78 rotates to drive the rotating arm 79 to rotate, and the rotating arm 79 rotates to drive the twisting turntable 74 to rotate. The force-saving arm 701, the rotating shaft 78 and the rotating arm 79 constitute a force-saving lever structure, which makes rotating the twisting turntable 74 more labor-saving.

[0038] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fully sealed and protected external support and tensioning belt polishing wheel device, characterized in that: The present invention comprises a first mounting seat, a main shaft, a second mounting seat, a rotation driving assembly, a mounting wheel, a movable outer support assembly, and an outer support driving assembly, wherein the main shaft is rotatably arranged on the first mounting seat, the main shaft passes through the second mounting seat and is fixedly connected to the second mounting seat, the mounting wheel is circular and has a first through hole at its center, the mounting wheel is fixed to the mounting seat and the main shaft is located in the first through hole, the number of the movable outer support assemblies is multiple, the outer peripheral wall of the mounting wheel is provided with a plurality of through grooves arranged in an interval and surrounding manner, the number of the through grooves is consistent with the number of the movable outer support assemblies and each of the through grooves has a movable outer support assembly movably installed therein, the outer support driving assembly is installed on the second mounting seat, and the plurality of the movable outer support assemblies are all connected to the outer support driving assembly, the outer support driving assembly drives the plurality of the movable outer support assemblies to synchronously extend out of the through grooves toward the outer peripheral wall of the mounting wheel or synchronously retract inward into the through grooves, and the rotation driving assembly is fixed to the first mounting seat and connected to the main shaft to drive the main shaft to rotate.

2. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 1, characterized in that: The movable outer support assembly includes a movable block and a connecting shaft, one end of the connecting shaft is connected to a side surface of the movable block, the through groove includes a first groove body matching the movable block and a second groove body matching the connecting shaft, the first groove body and the second groove body are connected and the second groove body is connected to the first through hole of the mounting wheel, a side surface of the movable block away from the connecting shaft is an arc surface matching the outer peripheral wall of the mounting wheel, the movable block is located in the first groove body, and the connecting shaft penetrates into the second groove body.

3. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 2, characterized in that: The external support driving assembly includes a cam plate and a connecting sleeve, the center of the cam plate is provided with a second through hole, the connecting sleeve passes through the center position of the cam plate and is fixedly connected to the cam plate, the bottom end of the connecting sleeve is rotatably connected to the second mounting seat and the main shaft is located in the inner hole of the connecting sleeve, the cam plate is provided with a plurality of guide grooves spaced around its center, the plurality of guide grooves extend from the center of the cam plate to the outer side wall, the number of the guide grooves matches the number of the movable external support assemblies, the movable external support assembly also includes a follower pin, the follower pin is connected to the connecting shaft, the movable pins of the plurality of movable external support assemblies correspond to the plurality of guide grooves one by one and penetrate into the guide grooves and abut against the groove walls of the guide grooves, the cam plate is provided with limiting grooves connected to the guide grooves at both ends of each guide groove, the guide groove and the limiting groove are slightly offset and the connecting part is an arc surface.

4. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 3, characterized in that: The external support drive assembly also includes a sealing flange and a twisting turntable. The sealing flange is fixedly mounted on the mounting wheel and a third through hole is provided in the center of the sealing flange. The main shaft and the connecting sleeve are located in the third through hole. The twisting turntable is connected to the end of the connecting sleeve away from the second mounting seat and is located above the sealing flange. A fourth through hole is provided in the center of the twisting turntable, and the main shaft passes through the fourth through hole. At least one ball screw is provided on the bottom surface of the twisting turntable, and an arc groove matching the number of the ball screws is recessed on the top surface of the sealing flange. The ball screw is inserted into the arc groove and the steel ball of the ball screw abuts against the bottom wall of the arc groove. The sealing flange is recessed on the bottom wall of one end of the arc groove and a groove for clamping the steel ball of the ball screw is provided.

5. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 4, characterized in that: The connecting sleeve is provided with a telescopic sealing sleeve, one end of the telescopic sealing sleeve is connected and fixed to the movable block, and the other end of the telescopic sealing sleeve is connected and fixed to the mounting wheel. A first sealing ring is arranged between the bottom surface of the sealing flange and the top surface of the mounting wheel, the first sealing ring is fixed on the sealing flange and fits the top surface of the mounting wheel, a second sealing ring is arranged between the peripheral wall of the third through hole of the sealing flange and the connecting sleeve, the second sealing ring is fixed on the peripheral wall of the third through hole of the sealing flange and fits the connecting sleeve, a third sealing ring is arranged between the connecting sleeve and the main shaft, and the third sealing ring is fixed to the connecting sleeve and fits the main shaft.

6. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 4, characterized in that: The external support driving assembly also includes a gantry, a rotating shaft, a rotating arm, a connecting rod and a labor-saving arm. The gantry is fixed to the top surface of the mounting wheel and spans the first through hole. The rotating shaft passes through the crossbeam of the gantry and is rotatably connected to the crossbeam of the gantry and is located above the torsion turntable. One end of the labor-saving arm is fixedly connected to the top end of the rotating shaft, and the bottom end of the rotating shaft is connected to the middle part of the labor-saving arm. There are two connecting rods, which are respectively fixedly installed at both ends of the labor-saving arm and both connecting rods are fixedly connected to the torsion turntable.

7. A fully sealed and protected externally supported and tensioned abrasive belt polishing wheel device according to claim 1, characterized in that: It also includes a grinding disc assembly, which includes a grinding disc and a connecting piece. The connecting piece is fixed to the top end of the main shaft, and the bottom surface of the grinding disc is connected to the connecting piece.

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